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Chinese Chemical Letters 2012年第12期23卷 1389-1392页

作者： Qian Qu Xiu juan yu Xi wu Fei Shi Li Li Wang Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of Ministry of Education Institute of Modern Separation ScienceNorthwest UniversityShaanxi Key Laboratory of Modern Separation Science

In this work, a kind of preparation method of zwitterionic ion chromatography （ZIC） stationary phase modified with phosphorylcholine （PC） was obtained by hydrolyzing after bonding phosphorylcholine dichloride to diol-silica to better explore the characteristics of the PC groups as ZIC stationary phase ligand in simultaneous separation of acidic proteins and basic proteins. The results showed that tv^o kinds of acidic proteins and three kinds of basic proteins can be separated completely, meanwhile, hen egg white was separated and purified and three kinds of egg white components ovalbumin, G2 ovoglobulin and ovotransfemin proteins were separated completely by one single step on PC-ZIC column, the purity of all proteins reached above 95%. PC-ZIC stationary phase was successfully improved with better separation capacity and selectivity than previously reported in this paper.

关键词： Phosphatidylchline Zwitterionic ion chromatography Protein Hen egg white

Application of 2D fluorescence correlation method to investigate the dilution-induced heterogeneous distribution of the bound FMN in azoreductase

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Chinese Chemical Letters 2015年第2期26卷 210-214页

作者： juan Feng Ting Han Mi-Qing Zhang yu Zhou Qing-Qin wu School of Life Science and Technology University of Electronic Science and Technology of China

AzoR is a homodimeric,flavin mononucleotide（FMN）-containing,NADH-dependent azoreductase from Escherichia *** this paper,we investigated the effect of the concentration of both AzoR and R59 G on the spectral behavior of the bound FMN using two-dimensional fluorescence correlation *** cross peaks（530,490） and（580,530） were observed from the dilution-induced 2D asynchronous correlation map of wt AzoR,while only one cross peak appeared at（600,530） for R59 C *** result indicated that the mutation at site 59 influenced the formation of dilution-induced *** specific activity of both AzoR and R59 G mutant was unaffected by dilution when the enzyme concentration is below 1 μmol/L,which suggested that no significant dissociation of FMN occurred at low ***,in order to explore the origin of these intermediates,we carried out a2 D correlation analysis using excitation wavelength-dependent fluorescence emission *** results showed that there coexisted two types of FMN that emitted fluorescence at 530 nm and 500 nm,*** together,these results suggested that the 2D method is a very powerful method to identify the heterogeneous distribution of the bound FMN in solution.

关键词： Azoreductase FMN 2D fluorescence correlation spectra Heterogeneous distribution

Sublethal effects of sulfoxaflor on the fitness of two species of wheat aphids, Sitobion avenae(F.) and Rhopalosiphum padi(L.)

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Journal of Integrative Agriculture 2019年第7期18卷 1613-1623页

作者： XIN juan-juan yu Wen-xin YI Xiao-qing GAO Jun-ping GAO Xi-wu ZENG Xiao-peng Department of Entomology China Agricultural UniversityBeijing 100193P.R. China Haidian District Center for Disease Prevention and Control Beijing 100094P. R. China Beijing Center for Disease Prevention and Control Beijing 100013P.R. China

Sitobion avenae(F.) and Rhopalosiphum padi(L.) are two important pests of wheat in *** typically coexist in fields during the late period of wheat *** is a novel sulfoximine insecticide that demonstrates broad-spectrum efficacy,especially in targeting sap-feeding *** study was carried out to investigate the sublethal effects of sulfoxaflor on the development,longevity,and reproduction of two species of wheat *** results showed that sublethal concentrations of sulfoxaflor did not cause significant effects on the fecundity or the longevity of the parent generation(F0 generation) of either *** or ***,it caused transgenerational sublethal *** ***,adult longevity of F1 generation was significantly *** significant differences were observed on the population parameters of *** in the F1 *** ***,the adult preoviposition period(APOP) and the total preoviposition period(TPOP) of F1 generation were significantly *** mean generation time(T) was significantly reduced in the *** F1 ***’s more,the intrinsic rate of increase(rm) and the finite rate of increase(λ) were significantly increased in the *** F1 *** together,these results suggest that exposure to the LC25 of sulfoxafl had no effects on the parent generation of *** or ***,but it reduced adult longevity of *** as a negative effect and increased the rm and λ of *** in the first progeny generation,which may have an impact on the population dynamics of ***.

关键词： Sitobion avenae Rhopalosiphum padi sulfoxaflor sublethal effect

Variations of mesoscale eddy SST fronts based on an automatic detection method in the northern South China Sea

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Acta Oceanologica Sinica 2020年第11期39卷 82-90页

作者： Chunhua Qiu juan Ouyang Jiancheng yu Huabin Mao Yongfeng Qi Jiaxue wu Danyi Su School of Marine Sciences Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519020China State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China

SST fronts at the mesoscale eddy edge(ME fronts)were investigated from 2007–2017 in the northern South China Sea(NSCS)based on an automatic method using satellite sea level anomaly(SLA)and SST *** relative probabilities between the number of anticyclonic/cyclonic ME fronts(AEF/CEF)and the number of anticyclones/cyclones reached 20%.The northeastern and southwestern parts of these anticyclones had more fronts than the northwestern and southeastern parts,although CEFs were nearly equally distributed in all *** number of ME fronts had remarkable seasonal variations,while the eddy kinetic energy(EKE)showed no seasonal *** total EKE at the ME fronts was three times of that within the MEs,and it was much stronger in AEFs than in *** interannual variability in the number of ME fronts and EKE had no significant correlation with the El Ni?o-Southern Oscillation(ENSO)*** mechanisms of ME fronts were discussed,but the contributions of mesoscale eddies to SST fronts need to be quantified in future studies.

关键词： detection method mesoscale eddy SST front northern South China Sea

Enhanced electrochemical CO_(2)reduction coupled with urea oxidation using bifunctional atomically dispersed CuNi catalysts

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Nano Research 2025年第1期18卷 208-216页

作者： Wenjie wu Haoyang Zhou Ying Liu Yifei Pan Qingqing Chen yu Zhang Junjie Mao Wenjie Ma Ping yu Beijing National Laboratory for Molecular Sciences Key Laboratory of Analytical Chemistry for Living BiosystemsInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China University of Chinese Academy of Sciences Beijing 100049China

The electrochemical conversion of carbon dioxide(CO_(2))into chemical fuels represents a promising approach for addressing global carbon balance ***,this process is hindered by the kinetic limitations of anodic reactions,usually the oxygen evolution reaction,resulting in less efficient production of high value-added ***,we report an integrated electrocatalytic system that couples CO_(2)reduction reaction(CO_(2)RR)with urea oxidation reaction(UOR)using a bifunctional electrocatalyst with atomically dispersed dual-metal CuNi sites anchored on bamboo-like nitrogen-doped carbon nanotubes(CuNi-CNT),which were synthesized through a one-step pyrolysis *** bifunctional CuNi-CNT catalyst exhibits a near 100%CO Faraday efficiency for CO_(2)RR over a wide potential range and outstanding UOR performance with a negatively shifted potential of 210 mV at 10 mA·cm^(-2).In addition,we assemble a two-electrode electrolyzer using bifunctional CuNi-CNT-modified carbon fiber paper electrodes as both cathode and anode,capable of operating at a remarkably low cell voltage of 1.81 V at 10 mA·cm-2,significantly lower than conventional *** study provides a novel avenue to achieving an efficient carbon cycle with reduced electric power consumption.

关键词： electrochemical conversion bimetallic site catalyst bifunctional electrocatalyst carbon dioxide reduction urea oxidation

Review of improved spectral response of ultraviolet photodetectors by surface plasmon

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Chinese Physics B 2018年第12期27卷 35-45页

作者： You wu Xiao-juan Sun yu-Ping Jia Da-Bing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China

Ultraviolet(UV) photodetectors based on wide band gap semiconductor have attracted much attention for their small volume, low working voltage, long lifetime, good chemical and thermal stability. Up to now, many researches have been done on the semiconductors based UV detectors and some kinds of detectors have been made, such as metal–semiconductor–metal(MSM), Schottky, and PIN-type detectors. However, the sensitivity values of those detectors are still far from the expectation. Recent years, surface plasmon(SP) has been considered to be an effective way to enhance the sensitivity of semiconductor based UV photodetector. When the light is matched with the resonance frequency of surface plasmon, the localized field enhancement or scattering effect will happen and thus the spectral response will be ***, we present an overview of surface plasmon enhancing the performance of UV detectors, including the GaN, ZnO,and other wide band gap semiconductor UV detectors. Both fundamental and experimental achievements are contained in this review.

关键词： detectors surface plasmonic GaN ultraviolet

Subsonic impulsively starting flow at a high angle of attack with shock wave and vortex interaction

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Chinese Journal of Aeronautics 2018年第9期31卷 1822-1828页

作者： Chenyuan BAI juan LI Ziniu wu School of Aerospace Engineering Tsinghua University Institute of Aeroengine Tsinghua University

Impulsively starting flow, by a sudden attainment of a large angle of attack, has been well studied for incompressible and supersonic flows, but less studied for subsonic flow. Recently,a preliminary numerical study for subsonic starting flow at a high angle of attack displays an advance of stall around a Mach number of 0.5, when compared to other Mach numbers. To see what happens in this special case, we conduct here in this paper a further study for this case, to display and analyze the full flow structures. We find that for a Mach number around 0.5, a local supersonic flow region repeatedly splits and merges, and a pair of left-going and right-going unsteady shock waves are embedded inside the leading edge vortex once it is sufficiently grown up and detached from the leading edge. The flow evolution during the formation of shock waves is displayed in detail. The reason for the formation of these shock waves is explained here using the Laval nozzle flow theory. The existence of this shock pair inside the vortex, for a Mach number only close to 0.5, may help the growing of the trailing edge vortex responsible for the advance of stall observed previously.

关键词： Advance of stall Compressible vortex High angle of attack Subsonic starting flow Unsteady shock waves

侵彻爆炸联合作用下超高性能混凝土遮弹层设计

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爆炸与冲击 2025年第1期45卷 88-101页

作者：程月华吴昊岑国华张瑜同济大学土木工程学院上海200092

为了准确评估超高性能混凝土(ultra-high performance concrete,UHPC)遮弹层在战斗部侵彻爆炸作用下的损伤破坏并建立可靠的计算方法,首先,开展了UHPC靶体抗105 mm口径弹体侵彻和5 kg TNT炸药爆炸联合作用试验,获取了侵彻作用后以及侵... 详细信息

为了准确评估超高性能混凝土(ultra-high performance concrete,UHPC)遮弹层在战斗部侵彻爆炸作用下的损伤破坏并建立可靠的计算方法,首先,开展了UHPC靶体抗105 mm口径弹体侵彻和5 kg TNT炸药爆炸联合作用试验,获取了侵彻作用后以及侵彻与爆炸联合作用后弹靶的损伤破坏数据;然后,建立了UHPC靶体抗弹体侵彻与爆炸作用的有限元模型,通过对上述试验和已有的有限厚UHPC板埋置装药爆炸试验进行数值仿真分析,验证了有限元模型和分析方法的可靠性;最后,对比了SDB、WDU-43/B和BLU-109/B等3种典型原型战斗部侵彻与爆炸联合作用下,UHPC遮弹层和普通混凝土遮弹层的临界贯彻和震塌厚度。结果表明:3种战斗部侵彻爆炸联合作用下,遮弹层的临界贯穿厚度和震塌厚度范围分别为1.30~2.60 m和1.70~5.00 m,相应的临界贯穿系数和震塌系数范围分别为1.81~2.17和2.46~4.17;与普通混凝土遮弹层对比,3种战斗部侵彻爆炸联合作用下UHPC遮弹层的开坑直径减小了34.4%~42.4%,临界贯穿和震塌厚度分别减小了7.1%~31.6%和39.7%~52.8%。研究结果可为UHPC遮弹层的抗力评估和设计提供参考。

关键词：超高性能混凝土遮弹层侵彻爆炸防护设计

Generalized Kutta–Joukowski theorem for multi-vortex and multi-airfoil flow with vortex production——A general model

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Chinese Journal of Aeronautics 2014年第1期27卷 1037-1050页

作者： Bai Chenyuan Li juan wu Ziniu School of Aerospace Tsinghua University

By using a special momentum approach and with the help of interchange between singularity velocity and induced flow velocity, we derive in a physical way explicit force formulas for twodimensional inviscid flow involving multiple bound and free vortices, multiple airfoils, and vortex production. These force formulas hold individually for each airfoil thus allowing for force decomposition, and the contributions to forces from singularities（such as bound and image vortices,sources, and doublets） and bodies out of an airfoil are related to their induced velocities at the locations of singularities inside this airfoil. The force contribution due to vortex production is related to the vortex production rate and the distance between each pair of vortices in production, thus frameindependent. The formulas are validated against a number of standard problems. These force formulas, which generalize the classic Kutta–Joukowski theorem（for a single bound vortex） and the recent generalized Lagally theorem（for problems without a bound vortex and vortex production） to more general cases, can be used to identify or understand the roles of outside vortices and bodies on the forces of the actual body, optimize arrangement of outside vortices and bodies for force enhancement or reduction, and derive analytical force formulas once the flow field is given or known.

关键词： Drag force Lift force Multibody Multiple vortices Vortex production

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The Data Processing of the LAMOST Medium-resolution Spectral Survey of Galactic Nebulae(LAMOST MRS-N Pipeline)

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Research in Astronomy and Astrophysics 2022年第7期22卷 224-234页

作者： Chao-Jian wu Hong wu Wei Zhang Yao Li juan-juan Ren Jian-Jun Chen Chih-Hao Hsia yu-Zhong wu Hui Zhu Bin Li Yong-Hui Hou CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyTaipaMacaoChina Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008China University of Science and Technology of China Hefei 230026China 8 Nanjing Institute of Astronomical Optics&Technology National Astronomical ObservatoriesChinese Academy of SciencesNanjing 210042China

The Large sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST) medium-resolution spectral survey of Galactic Nebulae(MRS-N) has conducted for more than three years since 2018 September and observed more than190 thousand nebular spectra and 20 thousand stellar ***,there is not yet a data processing pipeline for nebular *** significantly improve the accuracy of nebulae classification and their physical parameters,we developed the MRS-N *** article presented in detail each data processing step of the MRS-N Pipeline,such as removing cosmic rays,merging single exposure,fitting sky light emission lines,wavelength recalibration,subtracting skylight,measuring nebular parameters,creating catalogs and packing ***,a description of the data products,including nebular spectra files and parameter catalogs,is provided.

关键词： surveys catalogs methods:data analysis ISM:general